CBSE Board Practice

Class VI Class VII Class VIII Class IX Class X
CBSE Grade VII - Exponents and Powers
Question 1
1.
    • Write the given number in usual form
    • 3.059777
      ✕
      10 9
       
  • 30597770000
  • 3059777000
  • 305977700000
  • 30597770
  • 305977700
Question 2
2.
    • Simplify the expression
    • (-7) 5
       
    • ✕
    • (-7) 5
       
    • ✕
    • (-7) 5
       
  • (-7) 16
     
  • (-7) 15
     
  • (-9) 15
     
  • (-4) 15
     
  • (-7) 14
     
Question 3
3.
    • Find the exponential notation of
    • 5
      3
    • ✕
    • 5
      3
    • ✕
    • 5
      3
    • ✕
    • 5
      3
    • ✕
    • 5
      3
    • ✕
    • 5
      3
    • ✕
    • 5
      3
  •    
    6
    (
    5
    3
    )
         
  •    
    7
    (
    5
    3
    )
         
  • 1
  •    
    7
    (
    7
    3
    )
         
  •    
    8
    (
    5
    3
    )
         
Question 4
4.
    • Expand the following base power
    • 5 -3
       
  • 1
    25
  • 1
    512
  • 1
    125
  • 1
    8
  • 1
    625
Question 5
5.
Represent the given small number in standard form
-0.00006199157
✕
10 -8
 
  • -6.199157
    ✕
    10 -15
     
  • -6.199157
    ✕
    10 -11
     
  • -6.199157
    ✕
    10 -13
     
  • -6.199157
    ✕
    10 -12
     
  • -6.199157
    ✕
    10 -14
     
Question 6
6.
    • (
      s
      9
      s
      3
      		)
      3
    • =
  • s
    12
  • s
    9
  • 3
    s
    18
  • s
    3
  • s
    18
Question 7
7.
    • The
    • exponent
    • in the term
    • (
      7
      3
      )
      9
      		    
           
    • is
  • 5
    3
  • 7
    3
  • -9
  • (
    -7
    3
    		 )
  • 9
Question 8
8.
    • Write the given number in usual form
    • -6.640661
      ✕
      10 -5
       
  • -0.00006640661
  • -0.0006640661
  • -0.000006640661
  • -0.006640661
  • -0.0000006640661
Question 9
9.
    • (
      j
      −
      k
      		)
      (-7)
      .
      (
      j
      −
      k
      		)
      4
    • =
  • (
    j
    −
    k
    		)
    4
  • (
    j
    −
    k
    		)
    (-28)
  • (
    j
    −
    k
    		)
    (-11)
  • (
    j
    −
    k
    		)
    (-7)
  • (
    j
    −
    k
    		)
    (-3)
Question 10
10.
    • (
    • -2
      1
    • ✕
    • 7
      2
    • ✕
    • 5
      1
    • )
    • -3
       
    • =
  • (-2) -3
     
    ✕
       
    -3
    (
    5
    2
    )
         
    ✕
    3 -3
     
  • (-2) -3
     
    ✕
       
    -4
    (
    7
    2
    )
         
    ✕
    5 -4
     
  • (-2) -3
     
    ✕
       
    -2
    (
    7
    2
    )
         
    ✕
    5 -2
     
  • (-2) -3
     
    ✕
       
    -3
    (
    7
    2
    )
         
    ✕
    5 -3
     
  • (-2) -3
     
    ✕
       
    -3
    (
    9
    2
    )
         
    ✕
    7 -3